Rampant Randy a dad to 400

A rampant guinea pig has created havoc at an animal park in England after he broke out of his enclosure and impregnated 100 of his female friends.

Nicknamed "Randy" by staff at Hatton Country World, the guinea pig is now set to become a father to about  400 babies, the Huffington Post reported.

The animal park was now preparing to see its guinea pig population more than double.

"One of our male guinea pigs managed to find his way into the female enclosure and had a very good time by the looks of it," manager Richard Craddock said.

As the male and female guinea pigs are kept in separate pens, he suspected a child may have accidentally placed Randy into the wrong one - or the determined guinea pig may have found his own way in.

"We don't know how long Randy was in the female enclosure but it could have been several weeks which would have given him time to go round the entire female population," he said.

"He must have been quite a busy boy to get round that many girls."